Rút gọn: A = x(5x - 3) - x^2(x - 1) + x(x^2 - 6x) - 10 + 3x
Rút gọn: A = x(5x – 3) – x2(x – 1) + x(x2 – 6x) – 10 + 3x.
A = x(5x – 3) – x2(x – 1) + x(x2 – 6x) – 10 + 3x
= 5x2 – 3x – x3 + x2 + x3 – 6x2 – 10 + 3x = −10.